Alert archive / California / Flash Flood Warnings in 2014
Flash Flood Warning 101, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 12, 2014, 4:25 PM PDT for San Bernardino County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2014, 4:25 PM PDT (23:25 UTC)
- Expired
- Aug 12, 2014, 7:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 85 km from the middle of the area, began a volume at 23:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 11.4 hours before the alert went out and 137 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 17 J/kg
- Mixed-layer CIN
- -366 J/kg
- Mixed-layer LCL
- 2049 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
739 WGUS55 KVEF 122325 FFWVEF CAC071-130230- /O.NEW.KVEF.FF.W.0101.140812T2325Z-140813T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 425 PM PDT TUE AUG 12 2014 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 730 PM PDT * AT 422 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM CIMA TO KELSO. THE STORMS PRODUCING FLASH FLOODING WERE NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... CIMA AND MID HILLS CAMPGROUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3527 11532 3488 11560 3498 11579 3531 11566 $$ JH
2 follow-up statements
601 WGUS75 KVEF 130043 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 543 PM PDT TUE AUG 12 2014 CAC071-130230- /O.CON.KVEF.FF.W.0101.000000T0000Z-140813T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 543 PM PDT TUE AUG 12 2014 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 540 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA. LOCATIONS IMPACTED INCLUDE... KELSO...CIMA AND MID HILLS CAMPGROUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3527 11532 3488 11560 3498 11579 3531 11566 $$ JH
580 WGUS75 KVEF 130223 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 723 PM PDT TUE AUG 12 2014 CAC071-130232- /O.EXP.KVEF.FF.W.0101.000000T0000Z-140813T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 723 PM PDT TUE AUG 12 2014 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... RAINFALL DIMINISHED OVER THE WARNING AREA FROM CIMA TO KELSO. ANY FLOODING WHICH MAY HAVE OCCURRED SHOULD BE SUBSIDING. THERE IS POTENTIAL FOR MORE THUNDERSTORMS TO DEVELOP THROUGH THE EVENING HOWEVER. LAT...LON 3527 11532 3488 11560 3498 11579 3531 11566 $$ JH
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 6:22 PM PDT | Flash Flood Watch | VEF | San Bernardino | 38 hr |
| Aug 12, 12:40 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 1:16 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 12, 2:28 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 2:42 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 12, 4:05 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 40 min |
| Aug 12, 4:14 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 4:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 4:51 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in California, 2014Every flash flood warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.